1.

Consider the following pairs of parts: 1. Pair of gear in mesh 2. Belt and pulley 3. Cylinder and piston. 4. Cam and follower Among these, the higher pairs are:

A. 1 and 4
B. 2 and 4
C. 1, 2 and 3
D. 1, 2 and 4
Answer» E.


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